Electrical condenser



April 5 1927 G. F. A. STONE ELECTRICAL CONDENSER Filed July 15. 1925 lNVENTOR.

520:7: Kil may 4% Patented Apr. 5, 1927.

UNITED STATES I ononen rnnnfimcx amos sroNE, or Lonnon, ENGLAND.

FATE

, 1 ,623,563 NT OFFICE.

ELECTRICAL commnsnn,

Application filed m 15, 1925, Serial No. 43,682, and in tries should be firmly an rigidly clamped together, variation in the area of'the e f fective engagement between the elements of the condenser during operation producing, for a given number-of such elements, variation in capacity of the condenser as a whole. In order to overcome thisdisadvantage it has been proposed to secure the condenser plates and dielectrics together by boltsor rods passing through 'the elements, suitable nuts or other fastening devices co-operating with the bolts to force and maintain the elements of the condenser in eflicient relation to each other.

The object/of the present lnV8I1tlO11, Wl1lCl1 contemplates the use of securing devices of this general nature, is to provide an elec trical condenser which shall permit of the necessary close engagement of the elements of the condenser, but which at the same time sh all enable the capacity of the condenser to be readily varied by a simple operation persmitting the removal or addition of elements necessary to obtain such adjustment.

The invention is illustrated by way of example in the accompanying drawings:

Figure 1 of-which'is a plan view of one form of condenser constructed in accordance with the invention;

Figure 2 being a view thereof in sectional side elevation.

Referring now to the drawings, it will beseen that the condenser comprises a body portion l-of vulcanite or other suitable material of substantially rectangular form, having two outwardly projecting arms or lugs 2 arranged on opposite sides thereof. The arms or lugs 2 are each adapted to receive a terminal post 3, the lower end of which is embedded in the arm or lug 2. The upper face of the body portion 1 and of the arms or lugs 2 is provided with a pro]ecting flange or wall 4 so as to enclose a central circular recess 5 on the body portion 1 and two sub stantiall rectangular recesses 6 on the lugs. Each 0 the condenser plates 7 is of substantially circular form corresponding to the recess 5 in the body portion 1, and is pro vided with a lugS conforming in shape to Great Britain August 1, 1924.

the rccessesfi on thelugs The'several condenser plates 7, which are preferably "tonstructed of'thin sheet coppe are interfleaved with one another as 'shown'in Figure 2, being separated by dielectric discs 9, which are preferably of mica.

The depth ofthe'recess 5 is such as toaccommodate any desired number of condenser plates 7 and dielectric discs 9 up'to a predetermined number, 'dependent, of course,

upon the capacity of the condenser which is required. A central'opening is provided in each condenser plate 7 and in each dielectric 1 disc}? to accommodate a bolt 10 provided with a head 11 formed integral therewith and'having allange-12. The latter is adapted to engage with the recessed underside of the body portion 1-, as clearly shown in Fig ure 2, and the head 11 is provided with a screw-threaded aperture to accommddate a screw 13 by means of which ,the condenser may be attached to a plate or panel indicated in dot-ted lines at 14.

The central opening in each of the con denser plates 7 is somewhat larger than the central opening in each of the dielectric discs 9, and the latter are somewhat larger in external diameter than the condenser lates 7 so that all risk of electric connection etween adjacent condenser plates is avoided. Each of the lugs 8 on the condenser plates 7 is provided with an aperture to tric disc, and the columns of condenser plates and dielectric .dis'cs are secured' firml in positlon by means of a nut 16 on the be t 10. The lugs 8 on the several condenser plates"? in each recess 6 are securedin electrical connection with one another by a -nut 17 and washer 18.

It will be appreciated that the flangew or wall 4 serves accurately ,to determine the position of the condenser plates 7 in the central recess 5, owing to the lugs 8 on these plates fittingx closely within the recess 6 in the lugs 2, t e flange or wall 4 also protect-- accommodate one or other of the posts 3, m1

ing the edges of the condenser plates and.

as desired by the addition or removal of-condenser plates, so as correspondingly to vary the capacity of the condenser. Furthermore, owing to the positive clamping of the column of condenser plates and dielectric discs together, the capacity of the condenser for a given number of plates is accurately supportingplate or panel for the pur ose of 1 securing t e condenser in position t ercon.

In place of a single bolt for'securing the plates and dielectrics in (position, a. number of bolts may be provide all of which will preferably pass through the base portion of the device.

From the above description it will be apparent that a very sim 1e and rigid cons'truction is rovided an a variation in the number of e ements employed may be readily obtained without damage to the plates or 'dielectrics and without necessarily removing-the condenser from any'instrument to which it may, be attached It will be understood that the ipvention is not limited to the precise form of construction above{ described, and various modifications may be made in the form of the device without exceeding the scope of the invention. I p

Havin now described my ,sai'd invention,

Letters Patent, is 4 1. In an electrical condenser, the combination of a column of condenser plates interleaved with dielectricsand superposed upon one another, a body of insulating material having recesses therein, and lugs on each of said plates conforming in shape to the recesses in said body so as.;to..c enter said ,plates "relative to one anotherc.

2. In an electrical conde" r; the combination of a column of condenser plates interleaved with dielectrics and superposed upon one another, a body of insulating material having recesses therein, :1 lug on each of said plates conforming in shape to the recesses in said body, a pair of terminals mounted upon said body, every alternate plate being connected by means of its lugs D to one of said terminals and the remaining plates being connected by their lugs tothe other of said terminals.

3. In an electrical condenser the combination of a column of super osed condenser plates interleaved with dielectrics, abody of insulating material having recesses therein, a lug on each oisaid plates conformin in she e to the recesses of said body, an a mem er for securing said column to said body extending through aligned apertures in said condenser plates and dielectrics.

4. In an electrical condenser the combiterleaved' with dielectrics and superposed upon one another, a body ofinsulating material having recesses therein, a terminal lug nation of a column of condenser plates inprojecting fromeach of said condenser plates insubstantially the plane thereof, and

conforming in shape to one of the recesses in said body, and means secured to said body for clampin the plates and dielectrics of said cplumn in intimate contact withone another.

5. In an electrical condcnser.the 'combie" nation of a column of so rposed circular Y condenser plates interleave with dielectrics,

a body of insulating material having recesses therein, a terminal lug projecting fromeach of said condenser plates, and con'- forming in she e to one of said rece'me'sin said body, an means traversing central apertures in said plates and dielectrics .for

p O flaccuring said column to said b what I c aim as new and desire-to secure by,

ody.

plurality of dielectrics of greater lateral dimensions than said plates and interleaved with said plates,,a body of insulating ma- I terial,-- means constituted by a portion of szpd body for definingthe positionthe'rein o G. F. A. STONE.

id dielectrics,.and means constituted byanotierportion of said body for defining 6 In an electrical condenser the-combination of a plurality of condenser plates, 2. 

